# 10K Trainer by C25K® vs RUN interval

The clearest difference is ads: RUN interval at none against 10K Trainer by C25K®'s shown. 10K Trainer by C25K®'s advantage is ratings volume (22K vs 1K). On price, rating, review sentiment and update cadence there is nothing between them.

Both are free to download. 10K Trainer by C25K® sells 6 in-app purchases, starting at $4.99 per month and RUN interval sells 2 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

On the App Store both sit at effectively the same score — 4.8 for 10K Trainer by C25K® against 4.7 for RUN interval. That said, the two scores are not equally well evidenced: 10K Trainer by C25K® has 22K ratings behind it against 1K, so its average is the more settled of the two. Written reviews are what separate them: 76% of 10K Trainer by C25K®'s written reviews are positive against 77% of RUN interval's.

10K Trainer by C25K® ships an update every 6 weeks, RUN interval every 3 months. The most recent releases landed on October 20, 2026 and October 21, 2026 respectively.

## The numbers

| Metric | 10K Trainer by C25K® | RUN interval |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (22K ratings)](https://appshunter.io/ios/app/10k-trainer-by-c25k/id511600311/reviews)** | [4.7 (1K ratings)](https://appshunter.io/ios/app/run-interval-running-timer/id1352270752/reviews) |
| Number of ratings | **22K** | 1K |
| Positive reviews | 76.2% of reviews | **77.5% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | **Every 6 weeks** | Every 3 months |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 321 MB | 34 MB |
| Requires iOS | **14.0** | 15.6 |
| Devices | **iPhone, iPad, iPod, Apple Watch** | iPhone, iPod, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [Zen Labs](https://appshunter.io/developer/485971738) | [CAN YOU HEAR ME SOFTWARE](https://appshunter.io/developer/711042540) |

## What reviewers say

### 10K Trainer by C25K®

[App page](https://appshunter.io/ios/app/10k-trainer-by-c25k/id511600311)

This app guides beginners from sedentary to running a 10K in 14 weeks with a structured walk/run program. It features an audio coach, progress tracking, and community support. Ideal for those new to running or graduating from a 5K program.

**Highlights:** 14-week walk/run training plan, Audio coach guidance, Progress tracking, Community forums, Integration with Health app, Music integration

**Features:** Family Sharing, Apple Watch app, Vision Pro support

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Zen Unlimited Pass Monthly | $4.99 | per month |
| Unlock Your Potential | $29.99 | per 3 months |
| Unlock Your Potential | $29.99 | per 3 months |
| Zen Unlimited Pass Annual | $74.99 | per year |
| Remove Ads | $1.99 | one-time |
| Go To Pro | $6.99 | one-time |

**What reviewers like**

- 🚀 Gradual increase in running challenges
- 👍 Motivating and easy to follow
- 👍 Helpful for beginners and returning runners
- 👍 Allows listening to own music
- 👍 Provides voice prompts for guidance

**What reviewers complain about**

- 🐛 Inconsistent tracking of distance and calories
- 🐛 Occasional app crashes or freezes
- 🔋 Drains battery when running with phone
- 👎 Requires subscription for advanced features

**Reported bugs**

- Timers not syncing accurately with other devices
- Workout data sometimes not recorded properly

**Requested features**

- Apple Watch integration for standalone use
- More advanced training options beyond just 10K
- Ability to customize audio prompts and volume


### RUN interval

[App page](https://appshunter.io/ios/app/run-interval-running-timer/id1352270752)

This app simplifies interval and Fartlek running by allowing you to set custom targets for time or distance during hard, easy, and rest efforts. It offers detailed post-run summaries, audio and visual feedback, and an Apple Watch app for enhanced training.

**Highlights:** Customizable interval sessions, Time and distance targets, Distance Goal option, Audio and visual feedback, Detailed run summaries, Apple Watch app, Strava sharing

**Features:** Family Sharing, Apple Watch app, Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| The full RUN interval | $1.99 | one-time |
| The full RUN interval | $3.99 | one-time |


## Frequently asked questions

### Is 10K Trainer by C25K® free?

10K Trainer by C25K® is free to download, with in-app purchases available.

### Is RUN interval free?

RUN interval is free to download, with in-app purchases available.

### Which has better reviews, 10K Trainer by C25K® or RUN interval?

10K Trainer by C25K® is rated higher. 10K Trainer by C25K® averages 4.8 out of 5 from 22K ratings, while RUN interval averages 4.7 from 1K ratings.

### Do 10K Trainer by C25K® or RUN interval have ads?

10K Trainer by C25K® shows ads; RUN interval does not.

### Which is updated more often, 10K Trainer by C25K® or RUN interval?

10K Trainer by C25K® ships an update every 6 weeks, and RUN interval every 3 months. Most recently, 10K Trainer by C25K® was updated on October 20, 2026 and RUN interval on October 21, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*